AirHint found the following cheapest return flights from Las Vegas (LAS) to London (LHR) in March 2026 (see full year).

Return flights

02 Mar - 12 Mar	Virgin Atlantic
15 Mar - 25 Mar	British Airways
01 Mar - 11 Mar	Air Canada
01 Mar - 12 Mar	Air Canada
17 Mar - 24 Mar	Air Canada
05 Mar - 12 Mar	British Airways	direct
16 Mar - 26 Mar	Air Canada
15 Mar - 26 Mar	Air Canada
15 Mar - 04 Apr	British Airways
08 Mar - 28 Mar	British Airways
28 Mar - 18 Apr	Air Canada
28 Mar - 18 Apr	British Airways	direct
06 Mar - 14 Mar	Delta
27 Mar - 18 Apr	British Airways
13 Mar - 04 Apr	Air Canada
11 Mar - 04 Apr	Virgin Atlantic
28 Mar - 04 Apr	Aer Lingus
27 Mar - 18 Apr	Air France	direct

Also check the deals for one-way flights from Las Vegas to London in March.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Las Vegas to London in March from $616

Return flights